What do you think
"A" * "B"
means? Why? Have you read R's Introduction manual?
-- Bert
On Tue, Feb 14, 2012 at 9:50 AM, Jun Shen <jun.shen...@gmail.com> wrote:
> Thanks, Jeff,
>
> It did work in one way if I use
>
> xyplot(Y~X|as.factor(ID*PERIOD),data=...)
>
> But I would like to do something like
>
> xyplot(Y~X|as.factor(paste("ID=",ID)*paste("PERIOD=",PERIOD)),data=...)
>
> Then, it didn't work
>
> The error message:
> Error in paste("ID=", ID) * paste("PERIOD=", PERIOD) :
> non-numeric argument to binary operator
>
> On Tue, Feb 14, 2012 at 11:08 AM, Jeff Newmiller
> <jdnew...@dcn.davis.ca.us>wrote:
>
>> Set up a single (factor) variable that identifies the combinations that
>> exist, and plot using that variable.
>> ---------------------------------------------------------------------------
>> Jeff Newmiller The ..... ..... Go Live...
>> DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live
>> Go...
>> Live: OO#.. Dead: OO#.. Playing
>> Research Engineer (Solar/Batteries O.O#. #.O#. with
>> /Software/Embedded Controllers) .OO#. .OO#. rocks...1k
>> ---------------------------------------------------------------------------
>> Sent from my phone. Please excuse my brevity.
>>
>> Jun Shen <jun.shen...@gmail.com> wrote:
>>
>> >Dear all,
>> >
>> >In a plot command like
>> >
>> >xyplot(Y~X|ID*PERIOD,data=...)
>> >
>> >xyplot will generate all the possible ID*PERIOD combinations. But not
>> >all
>> >of them have data in there. So I have a lot of empty plots. How can I
>> >suppress those empty plots and ask xyplot only to generate plots
>> >actually
>> >with data. Thanks.
>> >
>> >Jun
>> >
>> > [[alternative HTML version deleted]]
>> >
>> >______________________________________________
>> >R-help@r-project.org mailing list
>> >https://stat.ethz.ch/mailman/listinfo/r-help
>> >PLEASE do read the posting guide
>> >http://www.R-project.org/posting-guide.html
>> >and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
--
Bert Gunter
Genentech Nonclinical Biostatistics
Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
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